CN205329129U - Sectional type rotary kiln group - Google Patents

Sectional type rotary kiln group Download PDF

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Publication number
CN205329129U
CN205329129U CN201520535514.7U CN201520535514U CN205329129U CN 205329129 U CN205329129 U CN 205329129U CN 201520535514 U CN201520535514 U CN 201520535514U CN 205329129 U CN205329129 U CN 205329129U
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rotary kiln
calcination
stagewise
heat storage
burner
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CN201520535514.7U
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刘占华
曹志成
薛逊
吴道洪
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Shenwu Technology Group Corp Co Ltd
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Beijing Shenwu Environmental and Energy Technology Co Ltd
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Abstract

The utility model discloses a sectional type rotary kiln group. This sectional type rotary kiln group is including a plurality of calcination rotary kilns that are used for segmenting the calcination to the material of establishing ties in proper order, wherein, and each calcination rotary kiln all includes: first casing, an accommodation space is prescribed a limit to by first casing, first rotation type barrel, first rotation type barrel is located in the accommodation space to inject the material heating space, a plurality of heat accumulatores, a plurality of heat accumulatores include: matter entrance end heat accumulator and material outlet end heat accumulator are followed material flow's direction is located respectively the both ends of first casing, and a plurality of first combustors, a plurality of first combustors are followed respectively matter entrance end heat accumulator with the embedding of material outlet end heat accumulator extremely the material heating space. This sectional type rotary kiln group's sintering temperature is high, and the heat utilization efficiency is high, and the calcination is even, and the energy consumption is low, the temperature adjustable of every rotary kiln.

Description

Stagewise rotary kiln group
Technical field
This utility model relates to technical field of industrial furnaces, in particular it relates to a kind of stagewise rotary kiln group。
Background technology
Rotary kiln refers to rotary calcination kiln, and wherein lime rotary kiln is the kiln using wide roasting small particles material, is suitably applied the manufacturing enterprises such as iron and steel, carbide chemical industry, non-ferrous metal。Rotary kiln baking intensity is low, sintering temperature is low for tradition, is generally not capable of utilizing or only can utilizing on a small quantity the problem of low-heat value gas, and roasting energy consumption is high, and roasting effect is uneven, and the adaptability of material and the kind of product are more single。
Therefore, rotary kiln haves much room for improvement。
Utility model content
This utility model is intended at least solve one of technical problem of existence in prior art。For this, a purpose of the present utility model is in that to propose a kind of stagewise rotary kiln group, and this stagewise rotary kiln group sintering temperature is high, and heat utilization efficiency is high, and roasting effect is uniform。
According to an aspect of the present utility model, this utility model provides a kind of stagewise rotary kiln group。According to embodiment of the present utility model, this stagewise rotary kiln group includes the multiple calcination rotary kilns for material carries out baking inphases being sequentially connected in series, and wherein, described calcination rotary kiln includes: the first housing, and described first housing limits the first accommodation space;First pivotable cartridge, described first pivotable cartridge is positioned at described first and holds space, and limits heating material space;Multiple heat storages, the plurality of heat storage includes material inlet end heat storage and material outlet end heat storage, along the direction of described Flow of Goods and Materials, lays respectively at the two ends of described first housing;And multiple first burner, the plurality of first burner is embedded in described heating material space from described material inlet end heat storage and described material outlet end heat storage respectively。
According to embodiment of the present utility model, the sintering temperature of stagewise rotary kiln group of the present utility model is high, and heat utilization efficiency is high, and roasting is uniform, and energy consumption is low, and the temperature of each rotary kiln is adjustable, thus, it is ensured that the adaptability of material and the multiformity of product。
Optionally, this stagewise rotary kiln group farther includes: for described material carries out before described stagewise roasting the preheating rotary kiln of the pre-heat treatment, wherein, described preheating rotary kiln includes: the second housing, and described second housing limits the second accommodation space;Second pivotable cartridge, described second pivotable cartridge is positioned at described second and holds space, and limits material preheating space;And second burner, described second burner is embedded in described material preheating space from described second housing。Thus, utilizing preheating rotary kiln material is dried and preheats, material efficiency of combustion in calcination rotary kiln is high。
Optionally, described preheating rotary kiln and the plurality of calcination rotary kiln stepped arrangement from high to low successively along Flow of Goods and Materials direction。Thus, material, after the preheating rotary furnace being positioned at highest point preheats, by action of gravity, enters each calcination rotary kiln successively gradually downward and carries out roasting。
Optionally, described first pivotable cartridge and described second pivotable cartridge are rotating Vortex。Thus, material all rotates in the same direction in the first pivotable cartridge and the second pivotable cartridge, thus, material is heated evenly, and material roasting is uniform。
Optionally, the angle that the axis of described calcination rotary kiln and the axis of described preheating rotary kiln flow downward for material horizontal by 7 degree of-9 degree respectively。Thus, material roasting time in each rotary kiln is shortened。
Optionally, the plurality of calcination rotary kiln being connected in series by seal pipeline carry out described in be connected in series。
Optionally, in adjacent two described calcination rotary kilns, it is positioned at the described material inlet end heat storage vertical non-alignment of described material outlet end heat storage and the described calcination rotary kiln being positioned at downstream of the described calcination rotary kiln of upstream。
Optionally, the described sealing pipeline of the described calcination rotary kiln of adjacent two is connected in two adjacent described calcination rotary kilns between the described material outlet end heat storage of described calcination rotary kiln and the described material inlet end heat storage of the described calcination rotary kiln in downstream in upstream。Thus, while saving construction space, also the material sealed in pipeline is played certain insulation effect。
Optionally, multiple described first burner on each described calcination rotary kiln hockets heating。Thus, efficiency of combustion is high, and heat utilization efficiency is high。
Optionally, described first burner and described second burner are heat-storage type burner。Thus, efficiency of combustion is high。
Stagewise rotary kiln group of the present utility model, at least has one of following advantages:
(1) this utility model stagewise rotary kiln group is by adopting Regenerative Combustion Technology, and using low-heat value gas as fuel, the efficiency of utilization of rotary kiln is high。
(2) by Regenerative Combustion Technology being combined with baking inphases technique, intensity of roasting is high and roasting effect good stability, it is adaptable to processes various materials, and can obtain different roasted products according to demand。
(3) this utility model stagewise rotary kiln group roasting time is short, and energy consumption is low, yield is high。Rotary kiln angle of inclination of the present utility model is 7~9 degree, bigger than 3~6 degree of traditional rotary kiln。This improves the intensity of roasting of monomer rotary kiln after being primarily due to employing heat storage type combustion, thus, material can reach identical roasting effect within the shorter time。With the increase at monomer rotary kiln angle of inclination, the movement velocity of material is accelerated, therefore, roasting time shortens, and then, contribute to the reduction of rotary kiln energy consumption and the raising of rotary kiln yield, when monomer rotary kiln angle of inclination is 7~9 °, its yield comparable tradition rotary kiln improves 10%~20%。
(4) this utility model adopts and seals pipeline and connect adjacent rotary kiln, it is to avoid the secondary oxidation of material, has been effectively ensured the quality of roasting material。
(5) this utility model stagewise rotary kiln is reasonable in design, makes full use of the architectural feature of rotary kiln, is arranged at by sealing pipeline between the adjacent heat storage of adjacent rotary kiln, thus, the efficiency of utilization of rotary kiln is high。
Additional aspect of the present utility model and advantage will part provide in the following description, and part will become apparent from the description below, or is recognized by practice of the present utility model。
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage are from conjunction with will be apparent from easy to understand the accompanying drawings below description to embodiment, wherein:
Fig. 1 shows the structural representation of the stagewise rotary kiln group according to one embodiment of this utility model;
Fig. 2 shows the operation principle schematic diagram of the stagewise rotary kiln group according to one embodiment of this utility model;
Fig. 3 shows the operation principle schematic diagram of the stagewise rotary kiln group according to one embodiment of this utility model。
Detailed description of the invention
Being described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of same or like function from start to finish。The embodiment described below with reference to accompanying drawing is illustrative of, and is only used for explaining this utility model, and it is not intended that to restriction of the present utility model。
In description of the present utility model, term " longitudinal direction ", " transverse direction ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", the orientation of the instruction such as " end " or position relationship be based on orientation shown in the drawings or position relationship, be for only for ease of description this utility model rather than require this utility model must with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model。
According to an aspect of the present utility model, this utility model provides a kind of stagewise rotary kiln group。Below with reference to Fig. 1, according to embodiment of the present utility model, this stagewise rotary kiln group is described in detail, this stagewise rotary kiln group includes the multiple calcination rotary kilns for material carries out baking inphases being sequentially connected in series, each calcination rotary kiln 1000 all includes: first housing the 1100, first pivotable cartridge (not shown), multiple heat storage 1300 and multiple first burner 1200, wherein, the first housing 1100 limits the first accommodation space;First pivotable cartridge is positioned at the first accommodation space, and limits heating material space;Multiple heat storages 1300 include material inlet end heat storage 1310 and material outlet end heat storage 1320, along the direction of Flow of Goods and Materials, lay respectively at the two ends of the first housing 1100;Multiple first burners 1200 are embedded in heating material space from material inlet end heat storage 1310 and material outlet end heat storage 1320 respectively。
According to embodiment of the present utility model, Regenerative Combustion Technology is combined by stagewise rotary kiln group of the present utility model with baking inphases technique, carries out material and carries out periodically roasting continuously, sintering temperature is high, intensity of roasting is good, and the heat utilization efficiency of rotary kiln is high, and roasting is uniform, the roasting time of material is short, energy consumption is low, and, the temperature of each rotary kiln is adjustable, thus, it is ensured that the adaptability of material and the multiformity of product。According to embodiment of the present utility model, stagewise rotary kiln group of the present utility model is applicable to process water-containing materials and siccative, by can be used for the direct-reduction of the ferrous materials such as nonferrous metallurgy slag, metallurgical dust, lateritic nickel ore and refractory iron ore after coal blending, and can according to user's request, different sintering temperatures is set in monomer rotary kiln, in order to obtain qualified roasting material。
According to embodiments more of the present utility model, heat storage uses special ceramic material manufacture, thus, there is very big heat exchange area and good conductivity of heat, thermostability, the thermal efficiency is high。
According to embodiments more of the present utility model, this stagewise rotary kiln group farther includes: for described material carries out before described stagewise roasting the preheating rotary kiln 2000 of the pre-heat treatment, wherein, this preheating rotary kiln 2000 includes: the second housing the 2100, second pivotable cartridge (not shown) and the second burner 2200, wherein, the second housing 2100 limits the second accommodation space;Second pivotable cartridge is positioned at the second accommodation space, and limits material preheating space;Second burner 2200 is embedded in material preheating space from the second housing 2100。Accordingly, for the material that water content is higher, when water content is more than 2%, it is possible to use material is dried and preheats by preheating rotary kiln, thus, material efficiency of combustion in calcination rotary kiln is high。
As shown in Figure 1, according to specific embodiment of the utility model, preheating rotary kiln 2000 and multiple calcination rotary kiln 1000 stepped arrangement from high to low successively along Flow of Goods and Materials direction, stepped arrangement can ensure that preheating rotary kiln 2000 and multiple calcination rotary kiln 1000 in the vertical direction are not overlapping。Thus, material flows to the coupled calcination rotary kiln 1000 being disposed below from being positioned at highest point preheating rotary kiln 2000, and flows in the calcination rotary kiln 1000 of series connection from high to low。
According to specific embodiment of the utility model, the first pivotable cartridge and the second pivotable cartridge are rotating Vortex, for instance, the first pivotable cartridge and the second pivotable cartridge are and turn clockwise or be rotation counterclockwise。Thus, material roasting is uniform。
According to embodiments more of the present utility model, the angle that the axis of the axis of calcination rotary kiln 1000 and preheating rotary kiln 2000 flows downward for material horizontal by 7 degree of-9 degree respectively。Thus, rotary kiln angle of inclination of the present utility model is bigger than 3~6 degree of traditional rotary kiln。This utility model improves the intensity of roasting of monomer rotary kiln after adopting heat storage type combustion, thus, material can reach identical roasting effect within the shorter time。With the increase at monomer rotary kiln angle of inclination, the movement velocity of material is accelerated, and therefore roasting time shortens, and then, contribute to the reduction of rotary kiln energy consumption and the raising of rotary kiln yield。If but the angle of the axis of rotary kiln and horizontal plane is more than 9 degree, the clear angle of rotary kiln is excessive, material preheats in rotary kiln, the time of roasting is too short, namely non-thorough roasting discharges from rotary kiln, and when monomer rotary kiln angle of inclination is 7~9 °, material roasting time in rotary kiln is suitable, and yield comparable tradition rotary kiln improves 10%~20%。
According to embodiments more of the present utility model, multiple calcination rotary kilns 1000 being connected in series are connected in series by sealing pipeline 1400, are attached also by sealing pipeline 1400 between calcination rotary kiln 1000 and preheating rotary kiln 2000。Thus, each calcination rotary kiln connects the good sealing effect of pipeline, it is to avoid secondary oxidation occurs material in the transmittance process of each roasting rotary furnace, thus, it is effectively ensured the quality of roasting material。Meanwhile, rotary kiln shell does not rotate with its internal pivotable cartridge, consequently facilitating burner and its fuel feeding duct are attached。
According to embodiments more of the present utility model, seal pipeline 1400 and be made up of high temperature resistant, corrosion resistant material。Thus, seal pipeline and not easily corroded by the high temperature highly corrosive material of delivered inside, seal the long service life of pipeline。
According to specific embodiment of the utility model, in adjacent two calcination rotary kilns 1000, it is positioned at material inlet end heat storage 1310 vertical non-alignment of material outlet end heat storage 1320 and the calcination rotary kiln 1000 being positioned at downstream of the calcination rotary kiln 1000 of upstream。Thus, the material outlet end heat storage 1320 of adjacent upstream calcination rotary kiln aligns with material inlet end heat storage 1310 in the vertical direction of downstream calcination rotary kiln, space between above-mentioned two heat storage is under the radiation of heat storage heat, there is higher temperature, the material of transmission between adjacent roasting rotary furnace there is good insulation effect, meanwhile, the arrangement space of rotary kiln group is also saved。
According to specific embodiment of the utility model, connect between the material inlet end heat storage 1310 of the material outlet end heat storage 1320 sealing pipeline 1400 calcination rotary kiln 1000 in upstream in two adjacent calcination rotary kilns 1000 of adjacent two calcination rotary kiln 1000 and the calcination rotary kiln 1000 in downstream。Thus, while saving construction space, also the material sealed in pipeline is played certain insulation effect。
According to embodiments more of the present utility model, multiple first burners 1200 on each calcination rotary kiln 1000 hocket heating。According to embodiments more of the present utility model, it is possible to control the first burner 1200 by Programmable Logic Controller (PLC), it is achieved alternately heating, cycle period is 60~90 seconds。With reference to Fig. 2 and 3, the principle of heating that the first burner is hocketed explains, wherein, Fig. 2 is first burner combustion 1200 on right side, first burner 1200 in left side is discharged fume, and the first burner 1200 that Fig. 3 is left side burns, and first burner 1200 on right side is discharged fume。First burner 1200 is embedded in heating material space from heat storage 1300 by this utility model, the heat storage 1300 that first burner 1200 embeds with it forms an entirety, regenerative combustion technology is utilized to be heated, kiln gas is completed out and the heat exchange entering stove combustion air, to reach to improve the effect of calcination rotary kiln 1000 thermal efficiency and energy-saving and emission-reduction by heat storage 1300。Heat storage 1300 and the first burner 1200 are installed in the both sides of roasting rotary furnace 1000 and carry out heat storage type combustion, first burner 1200 of roasting rotary furnace 1000 both sides is all alternate combustion, i.e. side burning, opposite side is discharged fume, then timing is changed, make the first burner 1200 being originally used for burning discharge fume, and the first burner 1200 being originally used for smoke evacuation burns, the circulation operation constantly gone round and begun again。As shown in above-mentioned schematic diagram A, for instance furnace temperature is 1280 degrees Celsius, the burner A of the first burner being positioned at left side is in smoke evacuation state, and the high-temperature flue gas that temperature is 1280 degrees Celsius enters from heat storage 1300 head, discharges from afterbody。When flue gas flows through heat storage 1300, heat is absorbed by heat storage, and is stored by heat storage 1300, substantially reduces from the temperature of the flue gas of afterbody discharge, and temperature is smaller than 150 degrees Celsius。The burner B of the first burner 1200 being positioned at right side is in fired state, and combustion air enters from heat storage afterbody, discharges from head。When air flows through heat storage 1300, heat storage 1300 heat release, heat is absorbed by air, air is heated to high temperature (only low 50 DEG C 100 DEG C than high-temperature flue gas) in the present embodiment, it is possible to be 1200 degrees Celsius, is then engage in burning。After reversal valve commutates, as it is shown on figure 3, the burner B being positioned at first burner 1200 on right side becomes smoke evacuation state, and the burner A being positioned at first burner 1200 in left side becomes fired state, completes the burning and gas-exhausting process in lower half cycle。Utility model people be surprised to find, heat storage and burner are combined by this utility model, carry out heat storage type combustion, at least one that can have the following advantages: 1) adopt regenerative combustion technology the flue gas that roasting process produces can be used for pre-heating fuel and air, improve the ignition temperature of fuel, reducing the exhaust temperature of flue gas, thus greatly increasing the efficiency of utilization of fuel, decreasing the discharge capacity of the pollutant such as NOX;2) the first burner of both sides is adopted to hocket heating, while realizing heat smoke UTILIZATION OF VESIDUAL HEAT IN, also can improve the intensity of roasting of monomer rotary kiln, and tradition rotary kiln at kiln hood one-way heating, therefore can only be only capable of preheating at kiln tail place material, it is impossible to realize roasting, the intensity of roasting causing rotary kiln is low, sintering temperature is relatively low, this utility model adopts Bidirectional heating, and the material being in kiln hood and kiln tail can carry out roasting, and roasting effect is to evenly;3) multiple calcination rotary kiln is adopted, according to different demands, differentiation roasting can be realized at each calcination rotary kiln monomer by accurately control sintering temperature and roasting condition, it is achieved baking inphases, obtain the roasting effect needed, and then ensure that the adaptability of material and the multiformity of product。
According to specific embodiment of the utility model, the first burner 1200 and the second burner 2200 are heat-storage type burner。Thus, efficiency of combustion is high。Thus, the combustion efficiency of burner is good, and the roasting time of material is short, less energy consumption, and yield is high。
According to specific embodiment of the utility model, utilize carrying roller 1500 that preheating rotary kiln 2000 and calcination rotary kiln 1000 are supported and transmission。Thus, it is simple to adjust position and the angle of preheating rotary kiln and calcination rotary kiln as required。
With reference to Fig. 1, material is illustrated at the conventional method of the roasting of stagewise rotary kiln group of the present utility model, wherein, preheating rotary kiln 1000 is connected with two grades of calcination rotary kilns, two grades of calcination rotary kilns are connected with one-level calcination rotary kiln, two grades of calcination rotary kilns are identical with the structure of one-level calcination rotary kiln, and concrete calcination steps is as follows:
(1) the kiln tail of the preheated rotary kiln 2000 of material feeds, being rotated in preheating rotary kiln 2000 and completing drying, preheating with preheating rotary kiln 2000, it is ensured that material moisture is less than 2%;
(2) after preheating, material is under gravity, and the discharging of sealed pipeline 1400 is to two grades of calcination rotary kilns, and carries out pre-burning, the Preburning material obtained in two grades of calcination rotary kilns with the pivotable cartridge of rotary kiln;
(3) Preburning material is through the sealing device discharging of the kiln hood of two-stage rotary kiln to one-level rotary kiln, and carries out roasting, the roasting material obtained in one-level rotary kiln with the pivotable cartridge in one-level rotary kiln。
Below with reference to specific embodiment, this utility model being illustrated, it is necessary to explanation, these embodiments are merely illustrative, and it is not intended that to restriction of the present utility model。
Below in conjunction with embodiment, scheme of the present utility model is made an explanation。It will be understood to those of skill in the art that the following examples are merely to illustrate this utility model, and should not be regarded as limiting scope of the present utility model。Unreceipted concrete technology or condition in embodiment, technology or condition described by the document in this area or carry out according to product description。
Embodiment 1:
In the present embodiment, three grades of rotary kilns are utilized to carry out roasting, these three grades of rotary structure schematic diagrams are as indicated with 1, three rotary kiln ends are joined end to end by sealing device with kiln tail, and arrange from high to low successively, three monomer rotary kiln angles of inclination are 7 °, and rotating Vortex, wherein preheating rotary kiln is only provided with burner at kiln hood, preheating rotary kiln is connected with two-stage rotary kiln, two grades of calcination rotary kilns are connected with one-level calcination rotary kiln, two grades of calcination rotary kilns are identical with the structure of one-level calcination rotary kiln, two-stage rotary kiln and one-level rotary kiln are being respectively arranged at two ends with the regenerative high temperature combustion technology room being made up of heat storage and burner。Specifically comprise the following steps that
(1) Copper making flotation tailings is allocated reduction coal dust and additive into, the TFe grade of this Copper making flotation tailings is 40%, and major impurity is silicates mineral。
(2) the above-mentioned material of step (1) is fed from the sealing kiln tail of preheating rotary kiln by charging gear, material moves with the direction to sealing kiln hood that rotates of rotary kiln, by preheating the burner on rotary kiln, material is preheated, the sealing device being meanwhile made up of sealing kiln tail and sealing kiln hood then remains stationary, the material after being preheated。
(3) the sealing pipeline discharging of the kiln hood of the preheated rotary kiln of material after preheating is to two-stage rotary kiln, and continue in two-stage rotary kiln to the direction motion sealing kiln hood, and the sealing pipeline of two-stage rotary kiln kiln hood also remains stationary, the calcined temperature controlling two-stage rotary kiln is 1200~1250 DEG C, and pass through exchange accumulation of heat and the roasting of regenerative high temperature combustion technology room, two ends, material is carried out continuous pre-burning, the iron-bearing mineral in nonferrous metallurgy slag is made to be become tiny iron granule by coal reduction gradually, thus obtaining Preburning material。
(4) Preburning material through the sealing pipeline discharging of two-stage rotary kiln kiln hood in one-level rotary kiln, and continue in one-level rotary kiln to the direction motion sealing kiln hood, the sintering temperature controlling one-level rotary kiln is 1250~1300 DEG C, by the exchange accumulation of heat of regenerative high temperature combustion technology room, two ends and roasting, Preburning material is carried out continuous roasting, fine metal ferrum granule in Preburning material is grown up gradually, obtains roasting material。
(5) roasting material is discharged with the kiln hood being rotated in one-level rotary kiln of one-level rotary kiln, namely obtains roasted product。
The roasted product obtained by said method, after mill ore magnetic selection processes, can obtain the metal iron powder of TFe grade more than 88%。Additionally, in the present embodiment, the angle of inclination of monomer rotary kiln is 7 °, its angle of inclination improves more than 15% than traditional rotary kiln, and thus, the roasting time of material can shorten at least 10%, not only energy consumption significantly reduces, and, the treating capacity of rotary kiln improves more than 10%。
Embodiment 2:
In the present embodiment, three grades of rotary kilns are utilized to carry out roasting, these three grades of rotary structure schematic diagrams are as indicated with 1, three rotary kiln ends are joined end to end by sealing device with kiln tail, and arrange from high to low successively, three monomer rotary kiln angles of inclination are 9 °, and rotating Vortex, wherein preheating rotary kiln is only provided with burner at kiln hood, preheating rotary kiln is connected with two-stage rotary kiln, two grades of calcination rotary kilns are connected with one-level calcination rotary kiln, two grades of calcination rotary kilns are identical with the structure of one-level calcination rotary kiln, two-stage rotary kiln and one-level rotary kiln are being respectively arranged at two ends with the regenerative high temperature combustion technology room being made up of heat storage and burner。Specifically comprise the following steps that
(1) allocating the lateritic nickel ore of moisture 15% into reduction coal dust, the TFe grade of this lateritic nickel ore is 20%, and Ni grade is 1.50%。
(2) the above-mentioned material of step (1) is fed from the sealing kiln tail of preheating rotary kiln by charging gear, material moves with the direction to sealing kiln hood that rotates of rotary kiln, by preheating the burner on rotary kiln, material is preheated, the sealing device being meanwhile made up of sealing kiln tail and sealing kiln hood then remains stationary, the material after being preheated。
(3) the sealing pipeline discharging of the kiln hood of the preheated rotary kiln of material after preheating is to two-stage rotary kiln, and continue in two-stage rotary kiln to the direction motion sealing kiln hood, and the sealing pipeline of two-stage rotary kiln kiln hood also remains stationary, the calcined temperature controlling two-stage rotary kiln is 1150~1200 DEG C, and pass through exchange accumulation of heat and the roasting of regenerative high temperature combustion technology room, two ends, material is carried out continuous pre-burning, lateritic nickel ore is made to be become tiny metal nickel-iron granule by coal reduction gradually, thus obtaining Preburning material。
(4) Preburning material through the sealing pipeline discharging of two-stage rotary kiln kiln hood in one-level rotary kiln, and continue in one-level rotary kiln to the direction motion sealing kiln hood, the sintering temperature controlling one-level rotary kiln is 1200~1250 DEG C, and pass through exchange accumulation of heat and the roasting of regenerative high temperature combustion technology room, two ends, Preburning material is carried out continuous roasting, ferrum and nickel in Preburning material are reduced further, and fine metal ferronickel granule is grown up gradually, obtain roasting material。
(5) roasting material is discharged with the kiln hood being rotated in one-level rotary kiln of rotary kiln, namely obtains roasted product。
The roasted product obtained by said method, after molten divisional processing, can obtain the dilval of TFe grade more than 80%, nickel grade more than 10%。Additionally, the angle of inclination of this utility model monomer rotary kiln is 9 °, its angle of inclination improves more than 40% than traditional rotary kiln, and therefore the roasting time of material can shorten at least 20%, while reducing energy consumption, can improve the treating capacity at least 20% of rotary kiln。
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example describe are contained at least one embodiment of the present utility model or example。In this manual, the schematic representation of above-mentioned term is not necessarily referring to identical embodiment or example。And, the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiments or example。
While there has been shown and described that embodiment of the present utility model, it will be understood by those skilled in the art that: these embodiments can being carried out multiple change, amendment, replacement and modification when without departing from principle of the present utility model and objective, scope of the present utility model is limited by claim and equivalent thereof。

Claims (10)

1. a stagewise rotary kiln group, including the multiple calcination rotary kilns for material being carried out baking inphases being sequentially connected in series, it is characterised in that described calcination rotary kiln includes:
First housing, described first housing limits the first accommodation space;
First pivotable cartridge, described first pivotable cartridge is positioned at described first and holds space, and limits heating material space;
Multiple heat storages, the plurality of heat storage includes material inlet end heat storage and material outlet end heat storage, along the direction of described Flow of Goods and Materials, lays respectively at the two ends of described first housing;And
Multiple first burners, the plurality of first burner is embedded in described heating material space from described material inlet end heat storage and described material outlet end heat storage respectively。
2. stagewise rotary kiln group according to claim 1, it is characterised in that farther include:
For described material carries out before described stagewise roasting the preheating rotary kiln of the pre-heat treatment, wherein, described preheating rotary kiln includes:
Second housing, described second housing limits the second accommodation space;
Second pivotable cartridge, described second pivotable cartridge is positioned at described second and holds space, and limits material preheating space;And
Second burner, described second burner is embedded in described material preheating space from described second housing。
3. stagewise rotary kiln group according to claim 2, it is characterised in that described preheating rotary kiln and the plurality of calcination rotary kiln be stepped arrangement from high to low successively along Flow of Goods and Materials direction。
4. stagewise rotary kiln group according to claim 2, described first pivotable cartridge and described second pivotable cartridge are rotating Vortex。
5. the angle that stagewise rotary kiln group according to claim 2, the axis of described calcination rotary kiln and the axis of described preheating rotary kiln flow downward for material horizontal by 7 degree of-9 degree respectively。
6. stagewise rotary kiln group according to claim 2, the plurality of calcination rotary kiln being connected in series by seal pipeline carry out described in be connected in series。
7. stagewise rotary kiln group according to claim 6, in adjacent two described calcination rotary kilns, it is positioned at the described material inlet end heat storage vertical non-alignment of described material outlet end heat storage and the described calcination rotary kiln being positioned at downstream of the described calcination rotary kiln of upstream。
8. stagewise rotary kiln group according to claim 7, connects the described sealing pipeline of the described calcination rotary kiln of adjacent two in two adjacent described calcination rotary kilns between the described material outlet end heat storage of described calcination rotary kiln and the described material inlet end heat storage of the described calcination rotary kiln in downstream in upstream。
9. stagewise rotary kiln group according to claim 1, the plurality of first burner on each described calcination rotary kiln hockets heating。
10. stagewise rotary kiln group according to claim 2, described first burner and described second burner are heat-storage type burner。
CN201520535514.7U 2015-07-22 2015-07-22 Sectional type rotary kiln group Active CN205329129U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105039687A (en) * 2015-07-22 2015-11-11 北京神雾环境能源科技集团股份有限公司 Segment type rotary kiln set
CN109686971A (en) * 2018-12-12 2019-04-26 无锡晶石新型能源股份有限公司 A kind of production method and production rotary kiln of nickelic polynary positive pole material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105039687A (en) * 2015-07-22 2015-11-11 北京神雾环境能源科技集团股份有限公司 Segment type rotary kiln set
CN109686971A (en) * 2018-12-12 2019-04-26 无锡晶石新型能源股份有限公司 A kind of production method and production rotary kiln of nickelic polynary positive pole material

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